package com.shr.code_interview;

import java.util.Stack;

public class Solution_9 {
    Stack<Integer> stack1 = new Stack<Integer>();
    Stack<Integer> stack2 = new Stack<Integer>();
    
    public void push(int node) {
        while(!stack2.isEmpty())
        	stack1.push(stack2.pop()) ;
        stack1.push(node) ;
    }
    
    public int pop() {
    	while(!stack1.isEmpty())
    		stack2.push(stack1.pop());
    	return stack2.pop() ;
    }
}
